International Labour Office
ILO (International Labour Organization), 2007
Buku Teks
edited by Prabhas Chandra Sinha
Pentagon Press, 2007
Buku Referensi
M. Sabir
Pustaka sinar Harapan, 1992
Buku Teks
Gill, Ranjit
Gramedia, 1988
Buku Teks
Asean Secretariat, 1997
Multimedia